Method and apparatus for selectively transferring electrical oscillatory energy



H. w. HO'UCK. I

METHOD AND APPARATUS FOR SELECTIVELY TRANSFERRING ELECTRICAL OSCILLATORY ENERGY.

APPLICATION FILED MAR- 29, 1920. 1,4L8 828, Patented Dec. 12, L922.

3 SHEETSSHEET I.

l l l hl H. W. HOUCK.

METHOD AND APPARATUS FOR SELECTIVELY TRANSFERRING ELECTRICAL OSCILLATORY ENERGY.

APPLICATION FILED MAR, 29, 1920- I Patented Dec. 12, 11922.

3 SHEETS-SHEET 2.

El mwmtoz H. W. HOUCK.

METHOD AND APPARATUS FOR SELECTIVELY TRANSFERRING ELECTRICAL OSCILLATORY ENERGY.

APPLICATION FILED MAR. 29, 1920.

1 ,438,828 Patented Dec. 12,1922.

3 $HEETSSHEET 3.

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To all whomitmqcomem; 1

Be it known'that I, HARRY W. HoUcK, a citizen of the United States, residing at New -York, in the county of New York,- State of '5 New York, have invented certain new and useful lmprovements in Methods and Apparatus for Selectively Transferring Electrical scillatory Energy; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains to make and use the same. I

This invention relates to a method andapparatus for transferring elliciently electrical oscillatory energy from one electrical system i or circuitto' another system or circuit without attenuation in such a manner as to simultaneously transfer electrical oscillations of any or all frequencies lying within a predetermined broad band of frequencies.

To this end the principle of resonance is "utilized and it is expanded in accordance with this invention to provide what will be termed, a sharp] tuned'electrical system for abroad bahd o frequencies, in contra-distinction jto-the usual sharply tuned system for. a given frequency, or' an extremely narrow band of frequencies, or, to' the wellknown' so-called broadly tuned systems. The expansionof resonance in accordance with this invention isvaccomplished by the use of a plurality of serially arranged electrically associated tuned oscillatory circuits, each of which is resonant to a given frequency, butwhose collective eflective resonance range includes or equals a broad band of frequencies. By interposing, coupling or linking the serially associated tuned oscillatory circuits with the source of electrical oscillatory energy, all electrical oscil lations of frequencies lying within the efiec tive resonance range of the tuned c rcuits will be transferred to the system or circu ts electrically associated with turfid circuits without attenuation.

The invention may be utilized in connection with the generation, transmisslon and reception of electrical osc-il1atory energy, or, in the amplificatlon of the received energy in wave signaling systems, it being particularly adaptable for this use. Modern wave signaling systems comprise radio telegraph, radiTr telephone, multiplex asaszisi PATENT orrice,

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or carrier telephone and telegraph, and long distance telephone systems. In connection at. w th any of the enumerated systems utilizing high or low frequency, it is well known that the present methods for amplifying such fire- 7 quencies are either inefiicient throu bout the range of a broad band otfrequencies, or do not provide at all for the amplification of such a band of frequencies. I I

The difliculties encountered inthe use of the present methods as well as their 'in--' 'efiiciency, will be understood from the following description. The invent-ion will also i .be understood from a consideration of the frequency but whose'collective efiective resonance range includes a broad band of frequencies;

F'gs. 2, 3 and 4 illustrate circuit arrangements including vacuum tubes whichfproe vide for the amplification of a broad band of frequencies, particularly high frequcm.

'cies Figs. 5, 6. 7 and 8 illustrate circuit arrangements in connection with a radio signaling system in which provision is made for the reception of electrical oscillations of a broad band of frequencies. In Fig. 1 the curve A represents a characteristic resonance curve for a vacuum tube high frequency amplifier system, which is capable of operating over a broad band of frequencies, but with low and substantially equal efliciency for any definite frequency. Such a curve is typical of an inductively coupled iron core transformer high fire-- quency amplifier.

The curve B represents a characteristic resonance curve for a vacuum tube high frequency amplifier which is operative over' a rot broad band of frequencies but which is more 60 range T e output side of the vacuum tube amplifier 2 also contains three ind'uctances 15, 16

efficient for certain frequencies than for others. This curve is typical of resistance wire Wound transformers, with or without other system. utilizing the present invention,

and is in effect the envelope of a series of' resonance curves' such as the curve C. A system possessing such a characteristic curve willbe termed a sharply tuned electrical oscillatory system for a broad band of frequencies. The system in Fig. 1 will have a similar resonance curve.

*- As pointed outabove the system of Fig; 1 comprising the serially arranged tuned oscillatory circuits LC, L,-C,, and L C,, each of which is tuned to a different frequency, possesses a characteristic curve such as that shown by curve D, each of the sections L--C, L,-C having individual characteristics such as that shown'by the curve C.

In Figs. 2, 3 and'4 the controlled electron discharge vacuum tubes 1, 2 and3, each comprising a cathode4, an anode 5, and a control electrode 6, are so arranged in the associated uum tu e amplifier contains three. iIIdIIC'.

circuits as to amplify ve efliciently electrie cal oscillations of a broa band of frequencies applied thereto from the source 7, 8.

In Fi 2 the outputside of the first vac tances 9, 10 and 11, each'of which is esociated inductively with one of a seriesof tuned oscillatory circuits 12, 13 and 14, in the input side of the second vacuum tube 2. The resonant frequency of each ofthe tuned oscillatory circuits 12, 13 and 14 is difierent from that of the others, and the values ofinductance and capacity are so chosen that frequencies near the resonant point of one of the tunedcircuits are by-pathed' to or from the circuit through the other circuits.

In this way, the circuits 12, 13 and 14 are capable of effectively and efficiently transferrin energy to the control electrode-circult o the vacuum tube all electrical oscillations of a broad band of frequencies lying.

within the collective effective resonance of the circuits 12, 13 and14.

' and 17. Each of theseinductances are-aslective effective resonance range of the series mas es of the vacuum tube amplifier 3. The resulting amplified oscillations are then available from the leads 21, 22 which are connected to tfihe output side of the vacuum tube ampli- In Fig. 3 the vacuum tube amplifiers 1 and 2 are provided with a series of oscillatory circuits 23, 24, 25, and 26,27, 28 in the output circuits'of the vacuum tube amplifiers 1 and 2, respectively. Asin the arrangement shown in Fig. 2, a series of oscillatory circuits 29, 30, 31,and 32, 33, 34 are located in\ the input sides respectively of the vacuum tube amplifiers 2 and 3. r

In Fig. 4, the arrangement of the oscillatory circuits is electrically similar to that of Fig. 3, but in this case an auto-transformer connection is used. Instead of utilizing two inductively related series of oscillatory circuits, a single series of oscillatory circuits are utilized between each vacuum tube amplifier, the series-of oscillatory circuits 35,36, 37, and 38, 39, 40 being simultaneously in the output side of the vacuum tube amplifier 1 and the input side of the vacuum tube amplifier 2 and in the output side of the vacuum tube amplifier 2 and in cuits comprise an inductance leg and a leg containing both capacity: and inductance,

'theiinductance and the capacity leg serving. to decrease the value of capacity necessary in order that the circuit may be resonant for a given fre uency.

It will t us be seen that in .the various arrangements of Figs 2 to 4, inclusive, any incoming energy lying withinfa broad band of frequencies which is included in the 0'01- of'oscillatory circuits will be effectively and eificiently amplified and transferred from the preceding out ut'circuit to the succeeding input circuit or the next step of-amplification.

- In Fig.. 5 a series ofoscillato circuits 41, 42 and 43 are shown associate wlth the antenna system 44, 45, the circuits 41, '42 and 43 being uni-laterally connected to the control electrode 6 of the vacuum tube am- 5 Iplifier 1. In this-way, any slgnal energy received by' the antenna system 44', 45' and which is of a frequency lying within the broad band of irequencies which the collective efi'ective'raii'ge of the oscillatory cir- 12 cuits 41, 42, 43 are designed to include, will in turn be transferred to the oscillatory c1rcuits and impressed upon the control electrode '6 of the vacuum tube 1. Amphfied oscillations of the incoming frequency will 125 thenbe resent in the inductance44 1n the out ut side of the vacuum tube ampl fier 1. This amplified energy will in turn be 1m. pressed upon the control electrode 6 of the vacuum tube amplifier 2 the instru- 1 80.

moss

mentalit of the oscillatory circuits 45, 46,

47, whic are uni-laterally connected to the control electrode 6. The third vacuum tube 3 of the system may be adapted to be a rectifier and in this case the highfrequency oscillations in the output side of the vacuum tube amplifier 2, are efiiciently transferred and, impressed upon the control electrode 6 of the vacuum tube detector 3 through the instrumentality of the oscillatory circuits 49, 50, 51. The detected energy in the leads 52 and 53 in the local circuit including the cathode 4 and the anode 5 of the vacuum tube detector 3 may be indicated in any well known manner.

.In Fig. 6 the antenna system 54,55 is shown associated with a simple aperiodic receivingsystem containing the oscillatory circuits 56 and. 57. .Incommg energy from collective effective range of resonance ofthe the antenna system 54, 55 will be supplied through the-inductive coupling 58, 59 to the secondary circuit containing the detector D and the oscillatory circuits 56 and 57. By associating the oscillatory circuits 56, 57 with the aperiodic secondary of this system, the secondary becomes sharply tuned for a broad bandof frequencies lying within the two oscillatory circuits 56, 57. The capacity 60 represents the inherent capacity of the secondary circuit. The detected oscillations are indicated by means of the telephone receivers RR.

4 In the high frequency amplifier system of Fig. 7, the antenna circuit 65, 66 is asso-' ciated with the input side of the vacuum tube amplifier 1. In the output side of this ampli er a series of tuned oscillatory circuits 67, 68 and 69 is inserted and which form one winding of the iron core transformers 70, 71 and 72. The windings 67, 68 and 69, respectively, have appreciable inherent capacity suflicient to tune each one ofithese circuits to agiven frequency. The collective effective resonance ran 'e, however, of the circuits 67, 68 and 69 Include a broad band of. frequencies. The secondary windings' 73, 74 and 75, respectively, ofthe iron core transformer 70, 71 and 72 are inserted in the input side of the vacuum tube amplifier 2. These circuits also possess appreciable inherent capacity, represented by dotted capacities between the windings. The inherent capacity in each case is sufiicient to tune each one of the windings to a given frequency. Their collective efi'ective range,

' however, include a broad band of frequenamplifier circuits of Fig. 8 is similar to cics. Similar transformers 76, 77 and 78 associate the output side of the vacuum tube and 84 are used to tune the circuits 85 and 86, respectively, but the remaining windings are so constructed as to permit of sufiicient mherentcapacity to tune the circuits to a given frequency.

The arrangements of both Fig. 7 and Fig... 8 provide for the amplification of an incoming energy lying within a broad and of frequencies." 'Moreover, after such incommg energy is amplified by the vacuum tube amplifiers 1, respectively, the amplified energy will be efiiclently and effectively transferrcd from the output circuit of this amplifier to the succeeding input circuit for the next step of amplification.

I claim 1. The method of transferrin efiiciently electrical oscillatory energy 0 any frequency or frequencle's lying within a contlnuous band of frequencies from one electrical system to another which comprises, .interposmg s1multaneously between said systems a plurality of tuned oscillatory circuits, each of which is resonant to a given frequency, and whose total effective range of resonance includes the said band of frequencies.

- 2. The method of transferring efiiciently high frequency electrical oscillations of any frequency orfrequencies lying within a broad band of frequencies from one electrical circuit to another which comprises, coupling simultaneously said second circuit to the first circuit by a plurality of electrically associated tuned oscillatory circuits, each of the tuned circuits being resonant to a given frequency, and whose collectively effective range of resonance equals or includes the said band of frequencies.

3. The method of transferring efficiently high frequency electrical oscillations of a broad band of [frequencies from one electrical circuit to another which comprises. coupling simultaneously said second circuit to the first circuit by a plurality of electrically associated tuned circuits icon taining inductance and capacity, eaeh of the tuned circuits being resonant to a given inductances being sojchosen that electrical oscillations of a given frequency within said band, are conducted by the other tuned circuits from or to a'tuned circuit resonant to this frequency.

4. The method pf multi-stage amplifying electrical oscillatory energy of a continuous band of frequencies which comprises interposin simultaneously a plurality of elec-' trical y associated tuned oscillatory circuits between each stage of the amplifyin means.

5. The method. of amplifying e eotrical oscillatory. energy of a continuous broad band of frequencies which comprises, in-

terposing simultaneously a plurality of,

electrically associated tuned oscillatory circuits .in the input sideof the amplifying means.

. broad band of frequencies which comprises,

interposing simultaneously a plurality of electrically associated tuned oscillatory circuits in the input side of each stage of the amplifying means.

8. Themethod of multi-stage amplifying electrical oscillatory energy of a-continuous broad band of frequencies which comprises, interposing. simultaneously a plurality of electrically associated tuned oscillatory circuits in the input and output sides of each stage of the amplifying means.

a. The method of amplifying electrical oscillatory energy "of a continuous broad band of frequencies, utilizing a controlled electronic discharge through a vacuum tube which comprises interposing simultaneously a plurality of electrically asociated tuned oscillatory: circuits in'tlie input slde at the said tub.v

10. The method of amplifying electrical oscillatory energy of a continuous broad band of frequencies, utilizing a controlled electronic discharge through a vacuum tube which comprises interposing simultaneously." a pluralityof electrically associated tuned oscillatory circuits in the input and in the output sides of the said tube;

trically associated tuned oscillatory "circuits in the input side'of each of the said tubes.

12. The method of multi-stage amplifying electrical oscillatory energy of a continuous- ,broad band of frequencies, utilizing conthrough a phi-- vacuum tubes which comprises. in-

trolled electronic discharges rality of I tel-posing simultaneously a plurality of electrically associated tuned oscillatory circuits in the input and in the output sides of each of the said tubes.

13. In apparatus for transferring efiicientlyelectrieal oscillatory energy of any frequency or frequencies lying within a con-.

tinuous band of frequencies, from one electrical systemto another, a plurality of tuned oscillatory circuits interposed simultaneously between. said systems. f I

14. In apparatus for transferring efficiently high frequency electrical oscillations of any frequency or frequencies lying within a broad band of frequencies, from one electrical system to another, a plurality of elec- .tricall y associated tuned oscillatory circuits latory circuits interposed between said cir-- cuits, each of said tuned circuits being resonant to a dill'erent frequency,

but Whose includes the said band of frequencies. 16. Apparatus for amplifying electrical or frequencies lying within atotal collective efi'ective ra'nge'ofresonance oscillatory energy of a continuous broad hand of fre uencies comprising a plurality of electron discharge devices-having a- .plurality of serially arrangedelectrically associated tuned oscillatory circuits interposed between each of said electron discharge devices, each of 's'aid'circuits being resonant to a difierent frequency and having a collective 11. The method of'multi-stage ampl fying electrical oscillatory energy of a continuous broad band .of frequencies, utilizing -con-. trolled electronic discharges through a,,plu-. rality of vacuum-tubes which comprises, in-' terposing simultaneously a plurality of else-"- tinuousbr'oad band of frequencies,the combinationijof a'plurality of electron discharge device'sz vvith a plurality of electrically as-' sociated -t,uned oscillatory circuits s1multaneously interposed between each stage of amplification, said-circuits having a collective effective resonance'range of resonance which includes said band offrequencies.

In-testimony' whereof I afiix m si HARRY W.. 0 0K.

ature. 

